Tire vulcanizer



Fatenteal lvilar Applicaten ated January S, 19%1..

To all' 'w from t may concern:

it known that li, Evan il. Ronnie, a. citizen ot the United States,residing at lvinneapolis, in the county of Hennepin and State otMinnesota, have invented certain new and useful improvements in Tire Vulcanizers; and l do hereby declare the i'ollowing to be full, clear,and exact description ot the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to vulcani/zing apparatus, and particularly tosuchl an apparatus constructed and arranged for vulcanizing tires. Thevulcanizer of this invention is arranged to be electrically heated andto have the electrical heating members controlled by a thermostat. Oneof the diticulties heretofore experienced With'such vul. canizers hasbeen that of overheating, andl it is an object of this invention,therefore, to so arrange the heating circuits in the vulcanizer that acertain safe degree of heat will be continuously supplied and furtherheat may be supplied by .the thermostatically controlled circuits.

It is a further object of the invention to provide a vulcanizer havingan enclosing housing constructed of sections which ar longitudinallyseparable.

'Other objects and advantages of the invention will become apparent fromthe ollowing description made in connection with the accompanyingdrawings in which like reference characters refer to the same partsthroughout the several views, and in which,

Fig. 1 is a View of the vulcanizer in side elevation, part thereof beingshown in seotion;

Fig. 2 is a view of the same in end elevation as 'seen from the right inFig. 1;

Fig. 3 is a partial radial section taken through one end or thevulcanizer, as shown in Fig. 1.; and

Fig. 4 is a diagrammatic view showing the wiring arrangement.

Referring to the drawings, the apparatus is seen to comprise a housingmade of two sections 10, which, when assembled, form a U-shaped troughof arcuate shape. These sections 10 are provided with central flanges 12which are provided with bolt holes by which the device can be secured inposition by suitable bolts or screws. End flanges 13 are also providedhaving their lower edges in the same parts as the lower edge oftheflange 'thi/5h88@ 12. The tlanges are also provided with. bolt holes andthe sections 10 are bolted to gether by nuttebolts 21, extendingtherethrough, as shown in Figs. 1 and 2. 'Vertical bosses 14 areprovided each side of the sections 10 centrally of the dang-es 12 andthese bosses are lapped. at their upper ends to receive boitsnot shown,which can. be tiedI together by a cross member passing across the topoit the sections. is shown in the sectional part of the housing in 1,

the walls thereof are provided with a channel 15 forming a shoulder ateach end ofthe section and a further channel or groove is providedformed in shoulder 16 at each end of the sections. The vulcanizing plateis shown as 1i and is also of U-shape in transverse cross section andarcuate shape longitudinally, to correspond with the shape of thehousing member and this member 17 is placed in the housing and has itsend portion contactingwith the shoulder 16 and its side portionscontacting with the shoulder 18, as shown in Fig. 3. It is thus held securely in position` The plate 17 is arranged to be heated by electricalheating elements comprising covered conductors which are disposed on thesurface thereof in longitudinal folds, as shown in Fig. 4. The outsidedotted line in Fig. 4 represents 'an approximate development of theexterior surface of the member 17 and the conductors 1 to 7 are arrangedthereon in longitudinal folds, as also indi cated by dotted lines insaid figure. There are a total of seven conductors, as indicated by thenumerals, and these are connected to the `terminals ot the thermostat a.This thermostat comprises movable members al, each of which is mured atits central portion to a central contact ofthe thermostat, and normallyhas its end portion in engagement with other contacts of the thermostat.When the temperature rises suiiiciently the ends ot these members willmove to the dotted line position shown in Fig. 4 and the engagement withthe contacts will thus be broken and the circuit closed by said contactswill be opened. There are three contacts of the thermostat at each sidethereof, i. e., the end contacts as and the central contacts a2 theformer of which represent contacts adapted to be opened and closed,while the center contacts are permanently closed and are connected tothe line members 8 and 9. The conductors 3, 4 and 5 have both of theirends connected to the central contact a2 of thethermostat, one of thesebeing connected at one side and-the other ends being connected at theother side. The conductors 1 and 7 have one of their ends connected tothe outside contacts a3 of the thermostat, as is shown at the left ofthe thermostat, as seen in Fig. 4, while the other ends of members 1 and7 are connected to the central contacts of the thermostat, as seen atthe right hand side of the same in Fig. if. The conductors 2 and 6haye'one of their ends connected to the central contact of thethermostat, as seen at the left. of the. same in Fig. 4, while theirother ends are conncctcd to the outside terminal of the thermostat, asshown at the right hand side of the same in Fig. 4. By this arrangement,the line members 8 and 9 will be continuously connected to threecircuits or sets of conductors. rl`he other four circuits or sets ofconductors will not be connected to the line members S and 9, exceptwhen separated by the opening of the outside contacts shown on thethermostat. The thermostat is placed in an aperture formed in the uppercorner of one of the sections l, as shown in Fig. 1, and is covered andprotected by a plate member 20 which is fastened to the section bysuitable screws.

The line members are shown as emergingr from the thermostat and coveredby an insulating conduit which passes through an aperture formed in theflanges 13. The line members 8 and 9 will, of course, be connected tosome suitable source of electric current controlled by a switch.

In operation, the parts to be vulcanized Will be placed in the plate 17and the controlling switch' manipulated to supply current to the linemembers 8 and 9. The plate 17 will thus be heated. If the heat suppliedexceeds a certain predetermined amount for which the thermostat has beensuitably adjusted, one of the contacts thereof will open and Will cutout one of the circuits 1, 2, 6 or 7. The three circuits', 4 and 5,which are continuously in operations, are so designed that theyI willnot supply enough heat to overheat the vulcanizer. By the use Vof thesethree circuits, therefore, and the four thermostatically controlledcircuits, the necessary and desired degree of heat will be readilyobtained. The folds orcoils of the conductors 1 to 7 are designated,generally, as 19, and these, as shown in Figs. 1 and 3, Will beconveniently disposed in the groove or channel 15 formed in the sections10.

It is thus seenpthat applicant has produced a convenient and simple formof vulcanizer and one in which the supply and degree of heat can beaccurately and nicely regulated. 'The vulcanizer can be easily made andyquickly and conveniently assembled, and when assembled, is of compactform and of sufficient strengthto operate efficiently. It will, ofcourse be understood that various changes may be made 1n the forni anddetails and arrangement; of the apparatus without departing from thescope of applicants invent-ion, which, generally stated, consists in thematter shown and described and set forth in the appended claims.

What is claimed is:

l. A vulcanizing apparatus comprising a plurality of heating circuitspermanently connected to the current supplying members and adapted tosupply a suitable degree of heat but not capable of overheating thevulcanizer, and a plurality of additional controlled circuits eachseparately and automatically controlled for supplying additional beat tothe vulcanizer and to be cut out when the ten'iperature rises beyond adetermined point.

2. A vulcanizer having in combination a vulcanizer plate, a plurality ofheating conductors arranged in longitudinal folds thereon, a thermostatcarried by said vulcanizcr having line contacts and other thermallycontrolled contacts, certain of the conductors being connected to saidline contacts and certain other of' the conductors being connected tothe thermally controlled contacts.

3. A vulcanizer comprising a U-shaped arcuate housing formed of twolongitudinal sections, a similarly shaped vulcanizing plate disposedtherein and abutting shoulders in said housing at its front and sidesurfaces, and a plurality of heating elements carried by said plate onits exterior surface, said housing having a channel in which saidheating elements are disposed.

4. A vulcanizer comprising a vulcanizing plate U-shaped in cross sectionand of arcuate shape longitudinally, a plurality of heating conductorsdisposed on the exterior surface thereof in longitudinal folds, athermostat carried by said vulcanizer having a pair of line contacts anda pair of opening and closing contacts for each line contact. certain ofsaid conductors'being connected to the line contacts of said thermostatat both of their ends and certain other of the conductors having one oftheir ends connected to the opening and closing contacts, and theirother ends connected to the line contacts.

5. A vulcanizer comprising a housing of cross sectional shape and ofarcuate shape longitudinally, said housing being divided centrally intolongitudinal sections` which sections are provided with flanges throughwhich pass securing bolts for holding said sections together, shouldersformed on the interior of said section and a vulcanizing plate of crosssectional U-shape and of arcuate shape longitudinally, having its endsand sides contacting with said shoulders whereby said plate is heldfirmly in position.

loo

i able degree of heat to said heatlng memberl but not capable of overheating the same, and

6. A heating device comprising a heatin member,.a plurality ofcircuitsof electrica heating members adapted to supply a suita pluralityofadditional separate and thermostatically controlled circuits forsupplying additional heatA to said device.

7. A heating device having in combination a pair of current supplyingmembers, a plurality of electrical heating circuits permanentlyconnected to said members adapted to supply a suitable degree of heat tosaid device Without overheating the same, and a plurality of-additionalheating circuits thermo'statically controlled in their connection toSaid current supplying members, all of saidcurcuits being uniformlydistributed over the Whole surface of the heating device.

8. A vulcanizing apparatus comprising a pair of current supplyingmembers, a plurality of heating circuits permanently connected to thecurrent supplying members and adapted to supply a suitable degree ofheat but not capablepof overheating the vulcanizer, vand a plurality ofadditional heating circuits each having a connection to said currentsupplying membersv .which is thermostatically controlled for supplyingadditional heat to the vulcanizer, all of said cir- 10. A vulcanizingapparatus comprising a plurality of heating circuits permanentlyconnected to the current supplying members and adapted to supply asuitable degree of' heat but not capable of overheating the vulcanizer,and aplurality of additional ther- -mostatically controlled circuits forsupplying additional heat to the vulcanizer, each one of said circuitsbeing uniformly distributed over the Whole surface of the vulcanizer.

1l. A heating device comprisin a heating member,"a circuit comprising ap urality of branches in parallel, said branches being laid upon saidheating member in folds and substantially covering the. surface of saidmember.

In testimony .whereof I a-ix my signature. EVEN J. ROI-INE.

